handle non-ASCII emoji names

* use the more inclusive regexp for validating emoji names
* always normalize emoji names, aliases, categories

the latter point is necessary to allow matching, for example, `ä`
against `a`+combining diaeresis

this will also need to bump the version of `sfm-js` once we merge
https://activitypub.software/TransFem-org/sfm-js/-/merge_requests/2

packages/frontend/src/components/MkEmojiPicker.vue

@@ -205,7 +205,7 @@ watch(q, () => {
 		return;
 	}
 
-	const newQ = q.value.replace(/:/g, '').toLowerCase();
+	const newQ = q.value.replace(/:/g, '').normalize('NFC').toLowerCase();
 
 	const searchCustom = () => {
 		const max = 100;